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MapleSim Hydraulics Library from Modelon

Piston  Simple piston

This is a model of a piston.

 

Equations

Variables

Connections

Parameters

Equations

0=fswitch+fA+fB

0=fswitch+fAsupport+fBsupport

ρ=ρoilpabs=pabs,T=T,vair=vgasoil,psat=psat

T=T0oil+ΔTsystem

V=Aswitchsarel+V0

f=Ap

p=pA

VA=V

sarel=sAsAsupport

mflowA=0

sabrel=piston

sabrel=switchsBsA

sBsupport=Lswitch+sAsupport

pabs=p+patmoil

Variables

Name

Value

Units

Description

Modelica ID

srela

 

m

Relative position of flangeA wrt supportA

s_rel_a

srelab

 

m

Relative position of flangeB wrt flangeA

s_rel_ab

f

 

N

Force acting in positive direction of flangeA

f

V

 

m3

Volume

V

T

 

K

Temperature

T

ρ

 

kgm3

Density

rho

pabs

 

Pa

Absolute pressure, used for all property calls

p_abs

p

 

Pa

Gauge pressure

p

psat

[1]

Pa

Gas saturation pressure

p_sat

[1] oil.gasSaturationPressureT=T,vgas=oil.vgas

Connections

Name

Description

Modelica ID

supportA

 

supportA

supportB

 

supportB

flangeA

 

flangeA

flangeB

 

flangeB

oil

Fluid property model

oil

portA

 

portA

Parameters

Name

Default

Units

Description

Modelica ID

L

 

m

Element length

L

reverse

false

 

Reverse the sign convention, see documentation for details

reverse

switch

-1reverse=true1otherwise

 

-1 if reverse, else 1

switch

V0

0

m3

Dead volume

V0

A

 

m2

Working area

A

piston

L

m

Piston length

l_piston

ΔTsystem

0

K

Temperature offset from system temperature

dT_system

See Also

Elements

MapleSim Hydraulics Library from Modelon Overview

 


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